Extension-table lock.



PATENTED JUNE 27, 1905.

G. W. MUNZ.

EXTENSION TABLE LOCK.

APPLICATION FILED MAR. l, 1904.

EN@ im@ [im W 6 tlNrTnn STATES Patented June 27, 1905.

ATENT OFFICE.

(.HARLICS IV. MUNZ, OF DETROIT, MICHIGAN, ASSIGNOR TO THE POS- SILIUSBROTHERS FURNITURE MANUFAO'IURINtr OOA'IIANY, OF

DETROIT, MICHIGAN, A CORPORATION OF MIOI I IGAN.

EXTENSION-TABLE LOCK.

SPECIFICATION forming part of Letters Patent No. 793,086, dated June 27,1905. Application tiled March l, 1904. Serial No. 196,085.

lb /LZ 'whom muy concer/1.' l

Be it known that I, OHARLns TV. MUNZ, a citizen of the United States,residing at Detroit, in the county of 'Vayne and State ot' )'Iicliig'an,have invented certain new and useful Improvements in Extension-TableLocks, ot' which the following is a specification, ret'- erence being'had therein to the accompanying' drawing's.

The invention relates to extension-tables, and has more particularreference to the means employed for lockingthe extensible sections ot'the table together when in contracted position.

The invention consists in the construction as hereinafter set forth.

In the drawing's, Figure l is a perspective view of an extension-tableto which my improvement is applied. Fig'. 2 is a perspective view ot'the parts forming the locking mechanism. Fig. 3 is a section on line u'a', Fig'. 2. Fig'. 4 is a longitudinal section through the table. Fig'.5 is a section through the means for adjusting' the locking-shoulder.

A and B are the two separable sections of the table-top, which, asshown, are ot' semicircular form, so as to `form when closed a roundtoptable.

O represents the extension-slides connecting the two sections A and B,and D is the edge rail depending from the top sections.

As shown, the table is supported upon a pedestal-standard comprising theseparable sections E and F, secured, respectively, to the cross-bars Gand H, attached to the lower edges ot' the extension-slides, and alsothe central leg I, secured to the crossbar J intermediate the cross-barsG and H and secured to the intermediate members ot' the extensionslides.Lith tables of this type ditiiculty is experienced in holding' thepedestal-sections together when the table is in contracted position, andvarious forms otl pedestal-locks have been devised for the purpose ot'drawing together and locking' said pedestal-sections. In the presentconstruction I have dispensed with the use of pedestal-locks and hold'the sections thereot' together solely by the locki ing ot' thetable-top sections, the locking mechanism being provided with means fortirst drawing said sections tightly tog'ether. This locking mechanism isof the following construction: Kis one memberot' the lock, which is inthe form of a bar secured at one end to the under side of one ot' thetable-top sections and projecting' beyond the inner edge thereot', so asto extend beneath the other section in the contracted position ot' thetable. For this bar K one ot' the slides ot' the table may be employed;but I preferably use a separate bar, (shown in Fig. 1,) which isarranged substantially in the central plane of the table. The projectingportion ot' the bar K is provided with a shoulder L for eng'ag'ing withthe cooperating locking' mem ber. This shoulder in the constructionshown is formed by cutting' a notch into the bar K on one side thereot'.M is the cooperating'locking member, which is in the form ot' arock-arm, pivotally secured at N to a bracket O, fastened to the underside of the table-top. The arm M is provided with the projecting'portion P, which has an inclined or cammed face adapted in the rockingmovement of the arm to engage with the shoulder L of the member K. Thiscammed portion is so arranged that in the normal position ot' therock-arm-that is, when extending' downward-the bar K will clear theportion P, so as to permit the free movement o1 the table-top sectionsin relation to each other. WIhen, however, the arm M is rocked upward,the table-sections having' been previously closed, the cammed portionwill engag'e with the shoulder L of the bar K and upon Vfurther movementwill press upon said shoulder, so as to draw the two sections ot' thetable-top tog'ether. The bracket O is so located on the under side ofthe table-top that the arm M may be conveniently reached from the end ofthe table and operated to lock or unlock the sections. A tension deviceis preferably provided for holding' the arm M in its diti'erentpositions ot' adjustment, and this is shown in this form by a spring' Q,surrounding' the screw which forms the pivot N and arranged in a recessR in the bracket member O. 'Ihe outer end of this spring bears againstthe arm M, so as to'frictionally resist the movement thereofsufiiciently to cause it to remain in any position to which it may beadjusted.

The construction described is exceedingly simple and inexpensive tomanufacture, is easily operated, and forms an absolute lock for thetable-sections. As the parts are secured to the under side of thetable-top, they are out of the Way of the slides and do not interferewith any of the Working parts of the table.

In order to guard against the locks becoming ineffective through theextension or contraction of the parts of the table, I preferably providean adjustment for the shoulder L. As shown, this is effected by formingan angleiron ci, which is slidingly secured to the end side of themember K and has one flange projecting into the notch or recess b insaid member. Y

c is an adjusting-screw which passes through an aperture in the end ofthe member K and engages with a nut CZ in a recess in said member, Whilethe end of said screw is adapted to bear against the fiange of the anglea. Thus Whenever the extension or contraction of the parts of the tablethrow the cam P and shoulder L out ofproper relative position the screwc may be adjusted to move the angle a into the proper position.

Vhat I claim as my invention is 1. In an extension-table the combinationWith separable table-top sections of a member secured to one of saidsections and extending beyond the inner edge thereof beneath the othersection, a bracket secured to the under side of the latter section, arock-arm pivotally secured to said bracket to swing in a planetransverse to the longitudinal plane of the table, a friction device forholding said rock-arm in different positions ef adjustment,

andra cam on said rock-arm for engaging the cooperating shoulder on saidmember to draw and lock the table-sections together.

2. In an extension-table, the combination With separable table-topsections, of a member secured to the under side of one section andextending beneath the other section, a shoulder and cooperatinglocking-cani on said member and the opposite section of the tablerespectively, and means for altering the relative positions of saidshoulder and cam in the closed position of the table.

3. In an extension-table, the combination with separable top sections,of a member secured to the under side of one section and extendingbeneath the side of the other section, an angle member slidablyconnected to said member, a cam on the opposite section of the table forengaging With the flange of said angle, and an adjusting-screw forbearing upon said flange and adapted to alter ,the position thereofrelative to said cam.

4. In an extensible table, the combination with separable top sections,of a member secured to the under side of one section, and extendingbeneath the adjacent side of the other section, an angle member slidablyconnected to said member, a cam on the opposite section of the table forengaging with the flange of said angle member, and means for alteringthe position of the ange relative to said cam.

In testimony whereof I afiix my signature in presence of tWo Witnesses.

CHARLES W. MUNZ.

Witnesses:

J As. P. BARRY, H. C. SMITH.

